Estimation of actual evapotranspiration by numerical modeling of water flow in the unsaturated zone: a case study in Buenos Aires, Argentina

A method is presented to estimate actual evapotranspiration (ET<sub>A</sub>) from potential evapotranspiration (ET<sub>P</sub>) by numerical modeling of water flow in the unsaturated zone. Water flow is described by the Richards equation with a sink term representing the root...

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Autores principales: Cesanelli, Andrés, Guarracino, Luis
Formato: Articulo
Lenguaje:Inglés
Publicado: 2009
Materias:
Astronomía
Evapotranspiration
Unsaturated zone
Numerical modeling
Argentina
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/131753
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-131753
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Astronomía
Evapotranspiration
Unsaturated zone
Numerical modeling
Argentina
spellingShingle Astronomía
Evapotranspiration
Unsaturated zone
Numerical modeling
Argentina
Cesanelli, Andrés
Guarracino, Luis
Estimation of actual evapotranspiration by numerical modeling of water flow in the unsaturated zone: a case study in Buenos Aires, Argentina
topic_facet Astronomía
Evapotranspiration
Unsaturated zone
Numerical modeling
Argentina
description A method is presented to estimate actual evapotranspiration (ET<sub>A</sub>) from potential evapotranspiration (ET<sub>P</sub>) by numerical modeling of water flow in the unsaturated zone. Water flow is described by the Richards equation with a sink term representing the root water uptake. Evaporation is included in the model as a Neumann boundary condition at the soil surface. The Richards equation is solved in a one-dimensional domain using a mixed finite element method. The values of ET<sub>A</sub> are obtained by applying a water stress factor to ET<sub>P</sub> to account for soil moisture changes during the simulation period. The proposed numerical model is used to estimate ET<sub>A</sub> in an experimental plot located in a flatland area in Buenos Aires (Argentina). Numerical results show that the proposed model is a useful tool for evaluating evapotranspiration under different scenarios.
format Articulo
Articulo
author Cesanelli, Andrés
Guarracino, Luis
author_facet Cesanelli, Andrés
Guarracino, Luis
author_sort Cesanelli, Andrés
title Estimation of actual evapotranspiration by numerical modeling of water flow in the unsaturated zone: a case study in Buenos Aires, Argentina
title_short Estimation of actual evapotranspiration by numerical modeling of water flow in the unsaturated zone: a case study in Buenos Aires, Argentina
title_full Estimation of actual evapotranspiration by numerical modeling of water flow in the unsaturated zone: a case study in Buenos Aires, Argentina
title_fullStr Estimation of actual evapotranspiration by numerical modeling of water flow in the unsaturated zone: a case study in Buenos Aires, Argentina
title_full_unstemmed Estimation of actual evapotranspiration by numerical modeling of water flow in the unsaturated zone: a case study in Buenos Aires, Argentina
title_sort estimation of actual evapotranspiration by numerical modeling of water flow in the unsaturated zone: a case study in buenos aires, argentina
publishDate 2009
url http://sedici.unlp.edu.ar/handle/10915/131753
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